Overview
How this machine carries the load.
123-SG-7D63 is an 18 kW off-grid mobile solar generator with no engine: 16 panels of 460 W, a 31.8 kWh lithium iron phosphate bank in six arrays, and an inverter rated 18 kW off-grid, all on a three-axle trailer. It is built for sites that need substantial power without noise, exhaust or a fuel delivery.
The inverter sets the 18 kW rating and delivers 120/240 V or 120/208 V at 50/60 Hz, with a 5 ms transfer and 97% conversion efficiency. It surges to 36 kW for 10 seconds, enough to start compressors, pumps and motors. The bank behind it can deliver 34.32 kW at 52 V, so the inverter — not the battery — is the limit at every load this machine is rated for, and full output stays available for as long as there is energy in the bank.
The 7.36 kW array harvests 31.6 kWh on an average day, and below 1.32 kW the sun carries the load indefinitely. Above that the bank does the work: 15.9 kWh usable at the standard 50% setting, which carries 5.14 hours at 3 kW, 2.57 hours at 6 kW, 1.71 hours at 9 kW, or 0.86 hours at the full 18 kW with no sun at all — 22.26 kWh if it is programmed to the 30% option.
The array feeds the inverter directly, so there is no separate charge controller to fit or to fail, and the machine is rated to run from +14 to +131 °F (-10 to +55 °C). That makes the 123-SG-7D63 a fit for telecommunications, construction, utilities, and oil and gas sites that draw heavily by day and settle back at night, moved and set up with one tow.
Features and benefits
- Inverter rated 18 kW off-grid at 120/240 V or 120/208 V, 50/60 Hz — Site equipment plugs in as it would on the grid, and electronics ride through a change of source.
- 36 kW surge for 10 seconds — Motor loads start without tripping the supply or oversizing the machine.
- 31.8 kWh lithium iron phosphate bank in six 5.3 kWh arrays — A night shift runs silently, with no fuel, no exhaust and no engine to service.
- 16 x 460 W panels, 7.36 kW nameplate — A steady base load runs on without a fuel delivery, a service call or a site visit.
- Bank able to deliver 34.32 kW at 52 V, above the inverter's own rating — The machine holds its full 18 kW for as long as there is energy in the bank.
- Array wired straight into the inverter, with no separate charge controller — Fewer parts to fail at a remote site, and a faster set-up on arrival.
Performance
Performance across the load range.
Zero to 18 kW, the rated maximum.
battery only, 50% settingbattery only, 30% settingthe array carries the whole dayrated continuous output
| Loadcontinuous, 24 h | Solar generationthe array, per day | Battery only | Daily drawload × 24 h | After solar | Days of autonomy |
|---|---|---|---|---|---|
| 1.32 kWsolar break-even | 31.6 kWh | 11.7 h / 16.37 h | 31.6 kWh | covered | indefinite |
| 3 kW | 31.6 kWh | 5.14 h / 7.2 h | 72 kWh | 40.4 kWh | 0.38 days |
| 6 kW | 31.6 kWh | 2.57 h / 3.6 h | 144 kWh | 112.4 kWh | 0.14 days |
| 9 kW | 31.6 kWh | 1.71 h / 2.4 h | 216 kWh | 184.4 kWh | 0.08 days |
| 12 kW | 31.6 kWh | 1.29 h / 1.8 h | 288 kWh | 256.4 kWh | 0.06 days |
| 15 kW | 31.6 kWh | 1.03 h / 1.44 h | 360 kWh | 328.4 kWh | 0.05 days |
| 18 kW | 31.6 kWh | 0.86 h / 1.2 h | 432 kWh | 400.4 kWh | 0.04 days |
Every load here runs continuously, and the day is 24 hours — daily draw is the load × 24 h, so 2 kW is 48 kWh. A load that runs an 8-hour shift draws a third of the figure shown and lasts three times as long. Battery-only hours are given at both state-of-charge settings. Solar is a daily energy offset, not an instantaneous power match — over a day it balances, within a day it is not a guarantee of cover.
Size it for your site
Your load, on 123-SG-7D63.
Most sites swing between a low and a high. Enter both, and the hours a day spent at the high, and the figures follow your day rather than a flat worst case. The load is yours — nothing is assumed until you enter it, and nothing that names you is kept; the PDF button builds the engineering sheet from the figures you enter.
PDF The engineering sheet, with page two worked out for your load.
| Held flat at your high24 h at the high load | Your dayhigh and low, as entered |
|---|
Read from the performance table above: engine hours and fuel follow the day's energy, so your day is read at its average load; solar is the published daily figure; battery-only hours are the published bank at your high load. A load held for 24 hours is the worst case at that level. With no days entered it runs indefinitely; a week and a year are your day repeated, at the same sun.
Gallery
On site and on the road.
Applications